48. A borrower makes a fully amortizing $100,000 loan at 3 percent for 30 years. The borrower is considering paying off the loan after 15 years. How much is the borrower saving in interests by paying off the loan earlier?
PVOrdinary Annuity = C*[(1-(1+i/100)^(-n))/(i/100)] |
C = Cash flow per period |
i = interest rate |
n = number of payments |
100000= Cash Flow*((1-(1+ 3/1200)^(-30*12))/(3/1200)) |
Cash Flow = 421.6 |
PVOrdinary Annuity = C*[(1-(1+i/100)^(-n))/(i/100)] |
C = Cash flow per period |
i = interest rate |
n = number of payments |
PV= 421.604*((1-(1+ 3/1200)^(-15*12))/(3/1200)) |
PV = 61050.57 |
Interest saved = monthly payments*number of payments left-PV of payments at 15 years
=421.604*15*12-61050.57=14838.15
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